LTC2909IDDB-2.5#TRMPBF

Supervisors Overview

The LTC2909IDDB-2.5#TRMPBF is a precision supervisory circuit manufactured by Analog Devices Inc., designed for monitoring multiple voltage rails in embedded systems. It features three independent input channels capable of detecting under-voltage, over-voltage, and negative voltage conditions with high accuracy. The device operates within an extended industrial temperature range of -40°C to +85°C and utilizes an 8-pin DFN package for compact surface-mount integration. Key electrical specifications include a maximum supply voltage of 6V, a typical quiescent current of 50µA, and a fixed reset delay time of 200ms. The threshold voltages are specified at 2.213V for one channel, with two additional channels offering adjustable thresholds.

Supervisors Feature Summary

• Provides precise monitoring for up to three independent voltage inputs simultaneously
• Detects under-voltage, over-voltage, and negative voltage anomalies via open-drain output
• Features adjustable threshold settings for flexible system configuration
• Includes a fixed 200ms reset delay to ensure stable power-up sequencing

Supervisors Applications

• Multi-rail power supply supervision in industrial control systems
• Voltage monitoring for portable battery-operated devices
• System protection in automotive electronics requiring wide temperature operation
• Embedded processor supervisor circuits ensuring reliable startup sequences

Supervisors Procurement Notes

Verify the specific suffix #TRMPBF confirms tape-and-reel packaging status before ordering. Confirm that the 2.5V designation aligns with the required threshold parameters for your design. Check current availability as distribution may vary. Ensure compatibility with the 8-WFDFN footprint during PCB layout. Validate RoHS compliance documentation if required for your manufacturing standards.

Supervisors Selection Notes

Select this component when simultaneous monitoring of three distinct voltage levels is required within a small form factor. The adjustable thresholds allow customization for non-standard rail voltages beyond the fixed 2.213V option. Consider the 50µA quiescent current impact on total system power budget. The open-drain output requires appropriate pull-up resistor selection based on the target logic voltage levels.

Supervisors Part Context

This part belongs to the LTC2909 family of precision triple/dual input monitors from Analog Devices. The IDDB suffix indicates the industrial temperature grade (-40°C to +85°C) and the DDB package code corresponds to the 8-lead DFN (3x2mm) housing. The #TRMPBF suffix denotes the tape-and-reel packaging format with lead-free plating. This series is designed for applications demanding high accuracy and low power consumption in space-constrained environments.

Supervisors Replacement Considerations

LTC2909IDDB-3.3#TRMPBF offers similar functionality with different fixed threshold voltages. LTC2909IDDB-5#TRMPBF provides comparable monitoring capabilities with a 5V reference point. Verify pinout compatibility and threshold requirements when substituting these variants within the same product line.